Sarah Mitchell Key Takeaways
- Clean the filter assembly every 2–4 weeks to prevent drainage issues and poor cleaning
- Run a monthly vinegar maintenance cycle to remove grease and mineral deposits
- Inspect spray arm nozzles for clogs — a toothpick clears most blockages
- Pre-scraping dishes (not pre-washing) gives the best cleaning results with LG dishwashers
The Bottom Line
Regular filter cleaning is the single most important maintenance task for LG dishwashers. Combined with monthly vinegar cycles, it prevents the most common problems: poor cleaning, drainage issues, and odors.
LG dishwasher maintenance — here is what every homeowner should know.
LG washer maintenance — here's what you need to know.
LG dishwashers deliver excellent cleaning performance when properly maintained. A few minutes of regular care prevents the most common dishwasher problems and keeps your dishes sparkling clean.
Clean the Filter Assembly Regularly
The filter at the bottom of your LG dishwasher catches food particles to prevent them from recirculating onto clean dishes. Remove the filter by twisting counterclockwise and pulling up. Rinse under running water with a soft brush to remove trapped food, grease, and mineral deposits. Clean this filter every 2–4 weeks depending on how often you run the dishwasher. A clogged filter is the primary cause of drainage problems, poor cleaning results, and unpleasant odors.
Run a Monthly Cleaning Cycle
Once a month, run an empty cycle with a dishwasher cleaner or 2 cups of white vinegar placed in a bowl on the top rack. Use the hottest cycle available. This dissolves grease buildup, removes mineral deposits from hard water, and sanitizes the interior. For stubborn mineral buildup, sprinkle a cup of baking soda on the bottom of the tub and run a short hot cycle after the vinegar cycle.
Maintain the Spray Arms
Spray arms have small nozzles that can become clogged with food particles or mineral deposits. Remove the spray arms (they typically unscrew or unclip) and rinse under running water. Use a toothpick or thin wire to clear each nozzle. Clogged nozzles result in dishes not getting clean, especially in specific rack areas. Check spray arms every 2–3 months for optimal cleaning performance.
Care for the Door Gasket
The rubber gasket around the dishwasher door prevents leaks. Wipe it with a damp cloth monthly to remove food debris and mildew. Pay attention to the bottom corners where moisture collects. A deteriorating gasket causes leaks that can damage your kitchen floor — replace it (From $80) at the first sign of cracking or hardening.
Loading Best Practices
Proper loading extends your dishwasher's life and improves cleaning. Scrape off large food particles but don't pre-rinse — LG dishwashers are designed to handle food residue, and some detergent needs food particles to activate properly. Don't block the spray arms with tall items. Load bowls and cups facing downward. Keep plastic items on the top rack away from the heating element. Avoid overloading, which strains the pump motor and reduces cleaning effectiveness.